There are 52 cards with different letters on either side, 4 blank cards, and a tray with 5 bins for cards. The cards are dealt evenly, players take turns placing letters in the trays until the last one is full -- making a valid word. Then there are no turns: players just play one of their cards to the middle, replacing a letter with another letter to make another valid word. When a player plays all his cards the round stops and he scores 1 point for each other card unplayed by the others. The first to 25 points wins.